Yakima Evenkeel The EvenKeel features an all new universal attachment system that fits round, square and most factory crossbars. It's innovative HullFlex design conforms to your boat for unbeatable hull protection. Comes complete with straps, hooks and bowstern tie downs for everything you need to carry your boat. HullFlex technology conforms to your boat's hull like a glove. Quick and easy tool free installation. Fits directly to round, square and most factory crossbars. Includes heavy duty straps and bowstern tie downs to keep your boat secure. Optional security bolts included.